OEM Carrier 60VA Control Transformer 115/208/230V–24V for Model PH13PR03600GAJAA

This OEM control transformer is the factory-specified replacement for the Carrier PH13PR03600GAJAA heat pump system. The control transformer steps down high-voltage line power (115, 208, or 230V primary) to the 24V AC signal that powers your thermostat, contactor coil, and control board. When this transformer fails — due to a shorted secondary, overloaded control circuit, or age-related winding breakdown — the entire low-voltage control circuit goes dead. Symptoms include a completely unresponsive thermostat, a system that won't start under any mode, or a blown 3A control fuse that keeps returning.

• Specs: 60 VA power rating | 115/208/230V AC primary (multi-tap) | 24V AC secondary | 50/60 Hz | Foot-mounted chassis | OEM part number HT01AW229
• OEM vs Generic: This is a Factory Authorized Parts (FAP) OEM unit built to exact Carrier tolerances. Generic 60VA transformers frequently exhibit secondary voltage sag under full load, which can cause erratic contactor chatter and nuisance board lockouts — issues that don't appear until the busy season.
• Install difficulty: 3/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade terminals. Photograph all wiring connections before removal. Check for a shorted secondary circuit (stuck contactor coil, grounded wire) before installing the new transformer to prevent immediate re-failure.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.

Compatibility: Engineered as a direct drop-in for Carrier model PH13PR03600GAJAA. The multi-tap 115/208/230V primary makes this transformer adaptable across voltage configurations on this platform. Verify your unit's data plate voltage before selecting primary tap wiring. Have a question about fitment? Our HVAC parts team confirms compatibility before you order — reach us via chat or phone.